Saying the words that come from knowledge is no sign of having it.

Ancient laws remain in force long after the people have the power to change them.

Pleasure in the job puts perfection in the work.

...for all men do their acts with a view to achieving something which is, in their view, a good.

All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion, desire.

Pleasure causes us to do base actions and pain causes us to abstain from doing noble actions.

Since we think we understand when we know the explanation, and there are four types of explanation (one, what it is to be a thing; one, that if certain things hold it is necessary that this does; another, what initiated the change; and fourth, the aim), all these are proved through the middle term.